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Geo-Coder-OpenCage-0.36
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/ Geo::Coder::OpenCage

NAME

Geo::Coder::OpenCage - Geocode coordinates and addresses with the OpenCage Geocoding API

VERSION

version 0.36

SYNOPSIS

    my $Geocoder = Geo::Coder::OpenCage->new(api_key => $my_api_key);

    my $response = $Geocoder->geocode(location => "Donostia");

DESCRIPTION

This module provides an interface to the OpenCage geocoding service.

For full details of the API visit https://opencagedata.com/api

It is recommended you read the best practices for using the OpenCage geocoder before you start.

METHODS

new

    my $Geocoder = Geo::Coder::OpenCage->new(api_key => $my_api_key);

Get your API key from https://opencagedata.com.

Optionally "http => 1" can also be specified in which case API requests will NOT be made via https

ua

    $ua = $geocoder->ua();
    $ua = $geocoder->ua($ua);

Accessor for the UserAgent object. By default HTTP::Tiny is used. Useful if for example you want to specify that something like LWP::UserAgent::Throttled for rate limiting. Even if a new UserAgent is specified the useragent string will be specified as "Geo::Coder::OpenCage $version"

geocode

Takes a single named parameter 'location' and returns a result hashref.

    my $response = $Geocoder->geocode(location => "Mudgee, Australia");

warns and returns undef if the query fails for some reason.

If you will be doing forward geocoding, please see the OpenCage query formatting guidelines

You should check the always response status

  $response->{status}{code}

to ensure you have had a successful response, are not hitting rate limits, etc. Please see the OpenCage geocoding API response codes

The OpenCage Geocoder has a few optional parameters:

Supported Parameters

please see the OpenCage geocoder documentation. Most of the various optional parameters are supported. For example:

language

An IETF format language code (such as es for Spanish or pt-BR for Brazilian Portuguese); if this is omitted a code of en (English) will be assumed.

limit

Limits the maximum number of results returned. Default is 10.

countrycode

Provides the geocoder with a hint to the country that the query resides in. This value will help the geocoder but will not restrict the possible results to the supplied country.

The country code is a comma seperated list of 2 character code as defined by the ISO 3166-1 Alpha 2 standard.

Not Supported
jsonp

This module always parses the response as a Perl data structure, so the jsonp option is never used.

As a full example:

    my $response = $Geocoder->geocode(
        location => "Псковская улица, Санкт-Петербург, Россия",
        language => "ru",
        countrycode => "ru",
    );

reverse_geocode

Takes two named parameters 'lat' and 'lng' and returns a result hashref.

    my $response = $Geocoder->reverse_geocode(lat => -22.6792, lng => 14.5272);

This method supports the optional parameters in the same way that geocode() does.

ENCODING

All strings passed to and received from Geo::Coder::OpenCage methods are expected to be character strings, not byte strings.

For more information see perlunicode.

SEE ALSO

Please see the Perl tutorial on the OpenCage site. Many other languages and frameworks are also available.

For full details of the API visit https://opencagedata.com/api

This module was featured in the 2016 Perl Advent Calendar.

AUTHOR

Ed Freyfogle <cpan@opencagedata.com>

COPYRIGHT AND LICENSE

This software is copyright (c) 2023 by OpenCage GmbH.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.